Screw-cutting machine.



No. 658,396. Patented Sept. 25, I900.

E. PHILLIPS.

SCREW CUTTING MACHINE.

(Application filed Ian. 31, 1900.

4 Sheets$heet I.

(No Model.)

IJV VENTOR.

Rms ravens co, PuoYo-uwo, WASNWOYCM. o c.

No. 658,396. Patented Sept. 25, I900.

E. PHILLIPS.

SCREW CUTTING MACHINE.

(Application filed Jan, 31, 1900. (No Model.) 4 sheets-Sheet 2.

WITNESSES. I 60 FIJVVENTOR.

I wfljtorney m: Noam vzwcas co. vnorouma, wAsmNoTum nv c No. 658,396. Patented Sept. 25, 1900. E. PHILLIPS. SCREW CUTTING MACHINE.

(Application filed Jan. 81, 1900.) (No Modal.) 4 Sheets-Sheet 3.

alga/M IJVVENTOR. a7 .7 $6522. 1

Patented Sept 25, I900.

E. PHILLIPS. SCREW CUTTING MACHINE.

(Appl at on filed Jan 31 1900 4 S haats Sheat 4.

(No Model.

WITNESSES NTTED STATES PATENT OFFICE.

EDWARD PHILLIPS, OF DETROIT, MICHIGAN, ASSIGNOR TO EDWARD T. GILBERT, OF SAME PLACE.

scREw-cur'rmo MACHINE.

SPECIFICATION forming part of Letters Patent No. 658,396, dated September 26,1900.

Application filed January 31, 1900. Serial No. 3,459. No model-l To all whom it may concern.-

Be it known that I, EDWARD PHILLIPS, a citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented certain new and useful Improvements in Cutter-Heads for Forming .line 5 5, Fig. 6.

Threads on Screws and Mechanism for Operating the Same; and I declare the following to be a full, clear, and exact description of the inventien, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification. V

My'invention has for its object a novel cutter-head for forming threads on screws and mechanism for operating the same; and it consists of the structure, combination, and arrangement of devices hereinafter described and claimed and illustrated in the accompanying drawings, in which- Figure 1 is a plan view embodying my invention. Fig. 2 is a side elevation of the same. Fig. 3 is a vertical section on the line 3 3, Fig. 2, showing the parts in end elevation. Fig. 4 is a View in section of the threading-head on the line 4 4, Fig. 6, showing also the bolt-head chuck and cross-head. Fig. 5 is a view of the same in section on the Fig. 6 is a front elevation of a threading-head with the parallel threadingdies and the inclined threading-cutters for threading the points shown in open position. Fig. 7 is a rear elevation of a threading-head. Fig. 8 is a view in section through the sliding collar and adjacent parts. Fig. 9 is a view in section of the feed-head and feed-nut and the feed-screw. Fig. 10 is a view of a pointed lag-screw blank. Fig. 11 is a view of such a screw threaded.

My invention is designed to produce a machine for the purpose specified of superior efficiency and utility, whereby more perfect work will be turned out rapidly in a simple and effective manner.

The purpose of the present invention is to provide means whereby a tapering pointed screw may be threaded both upon the body and upon the point of the screw in one and the same operation, the threads being cut on the body and point of the screw at a single operation of the dies and cutters along the bolt. In the accompanying drawings I have illustrated certain portions of the mechanism duplicated, so as to increase the capacity of the machine, whereby screws may thus be threaded in a more economical manner.

As shown in the accompanying drawings, I carry out my invention as follows:

A represents any suitable frame preferably provided with shaft-supporting standards or brackets A, provided with journals A B represents hollow spindles rotatable in said journals, said spindles being each provided with gears O, which are intermediate the ends of said spindles.

D is a driving-shaft provided with a driving-pulley D and mounted in journals A supported upon the standards or brackets A,

O is a pinion journaled upon a stub 0 meshing with gears O O and driven by a pinion C Carried upon one extremity of the hollow spindles B, respectively, is a threading-head E, said head provided with two parallel threading-jaws E E, fulcruined on pivot-pins I and provided with threading-dies E E at their outer ends. Said heads are also provided with twoinclined threading cutter-jaws E E provided with cutters E E for threading the point. The'parallel threading-jaws E are operated by means of a nut F, engaged with a rod F sleeved through the hollow spindle B, said nut connected with said threading-jaws by means of links F F. The rod F paSSGS through the hollow spindle B and is engaged at its opposite end with a toggle-nut H in a feed-screw head H. The feedscrew head is provided with jaws H fulcrumed intermediate their ends upon pivot pins H and are connected at one extremity thereof with the toggle-nut H by means of links f f. v

H is a feed-nut upon a feed-screw J, said screw projecting within the feed-screw head and at the opposite end is engaged with a cross-arm J, the parallel threading-jaws E and the jaws H of the feed-screw head being fulcrumed, as described.

It will be seen that when the connectingrod F is moved forward the toggle-nuts F and H, through the instrumentality of their respective connecting-links, will close the adthe feed-nut H said feed-nut being made of separable sections engaged with the correpen i j ws The feed-screw head H is engaged upon the corresponding hollow spindle B and is formed with an elongated orifice (indicated at h) to permit the operation of the toggle-links f in the reciprocation of the toggle-nut H, with which the connecting-rod F is engaged. termediate the ends .of the .hollowspiudl is located a sliding collar F keyed to the connecting-rod W, the spindle B being constructed with an elongated slot (indicated at b) to allow for the reciprocation of a key F engaging the sliding collar with the connecting- 1 rod, as shown in Fig. 8.

G is a cross-arm loosely engaging at its extremities slide-rods G said rods being connected at one extremity with the cross-arm J, carrying the feed-screw J. At their opposite extremities the slide-rods G2 are engaged with a cross-head K, provided with a chuck K to engage a bolt-head. The cross arms G and K may be made of two parts bolted together, as indicated in the drawings.

The sliding collar F is recessed on its periphery, as shown at f, to receive the crossarm G, said collar revolving within said crossarm. It will be perceived that the feedscrew J moves the slide-rods G forward, said rods carrying with them the cross-head K.

K denotes movable collars engaged upon the slide-rods, which may be set for any desired length of thread to be out upon the bolt.

K denotes stationary collars also engaged upon the slide-rods G The cross-arm G, carrying the collar F 1 connected with the rod F upon being moved forward. moves forward also the toggle-nuts F and H, thereby throwing open the threading-dies and the feed-nut jaw, thus releasing the finished screw and the feed-screw, whereupon the feed-screw is immediately thrown back into normal position by means of a weight L, operating a bell-crank lever L, as shown in Fig. 2.

This movement, it will be i seen, carries back the cross-arm G against j the stationary collars K thereby throwing back the toggle-nuts F and H and closing the threading-jaws and the feeding-screw aws.

The inclined threading-jaws E for threading the point are operated by means of a sliding collar M on the threading-head E, said collar being in turn operated by a strap M and secured to the slide-rods G, as shown. The sectional view embodied in Fig. 5 shows the inclined threading-jaws E in open position. The jaws E are formed with inclined surfaces, (indicated at M When the feedscrew J is released, as above described, the collar M is thrown back by the corresponding movement of the rods G to the position shown. The jaws E will be closed by the collar M engaging thetinclined surfaces M on the jaws E The adjacent edges of the collar M are also slightly beveled, as indicated at m. The collar M is so adjusted relative to the inclined threading-jaws E that when ,the point of the-screw being threaded protrudes through the threading-dies 15 it will be engaged by the cutters E At the same time the collar M will have reached the edge of the inclined surfaces M on the jaws E In the collar M is engaged a screw N, bevelcd at its inner end, as shown at a Within the h ad .lfl -s located a jaw-opening devi e to open the inclined threading cutter-jaws E (indicated at N,)pr0vided with a stem n,passing through the head, to engage the opposite jaw E as shown in Fig. 5. This jaw-opening device is formed also with a recess (indicated at n) beveled at its inner edge, as indicated at 11 When the point of the screw N engages the inclined surfaces n of the jawopening device N, the jaws E are forced open as-the collar Mtravels back, as indicated the bell-crank L, this operation of the bell crank occurring at the same time the parallel threading-dies E close.

The cross-head K, carrying the bolt-head chuck K, slides on guide-rods O, secured upon a bracket 0 said cross-head being adjustable'upon the slide-head E to suit the difierent lengths of screws to be threaded.

The spindles B, adjacent to the threadingheads E, are formed with a housing engaging portions of the head, as indicated at B.

It will be obvious that the mechanism for operating the feed-screw enables the cutterhead to be reversed or restored into normal position after having cut the threads upon a given screw without having to reverse the action of the feed-screw, the machine reversing instantly, and thereby increasing very materially-the capacity of the machine.

The tapering surfaces M correspond with the taper of the point of the screw, so that the pointing-jaws are kept in line with the surface of the point of the screw. The mechanism for opening and closing the jaws E at the proper time by means of the sliding collar andthe opening device are important features of the invention. The jaws E after operating upon the point of the screw are then released, so that the parallel jaws can finish cutting the threads upon the body of the screw or bolt. It will also be observed that; the cutter-head is moved forward by the feed-screw instead of being drawn forward as the threads upon the screw are being out.

What I claim as my invention is 1. A rotatable and reciprocatory cutterhead for forming threads on screws provided with parallel threading-jaws pivot-ally connected therewith, means to open and close said jaws. expansible inclined th reading-jaws connected with said head, means to close said inclined threading-jaws, a jaw-opening device within the head to open the inclined threading-jaws, and means to hold the work.

2. A rotatable and reciprocatory cutterhead for forming threads on screws provided with parallel threading-jaws pivoted thereto intermediate their extremities, threaded dies engaged with said jaws, expansible inclined threading-jaws carried by said head having cutters engaged therewith, means to open and close said parallel threading-jaws, and means to close said inclined threading-jaws, a jaw-opening device within the head to open the inclined threading-jaws, said head having in combination therewith a rotatable spindle engaging said head, and means to reciprocate said spindle and head.

3. A rotatable and reciprocatory cutterhead for forming threads on screws provided with parallel threading-jaws pivoted thereto intermediate theirextremities,threading-dies engaged with said jaws, eXpansible inclined threading-jaws carried by said head having cutters engaged therewith, means to open and close said parallel threading-jaws, means to close said inclined threading-jaws, a jawopening device within the head to open the inclined threading-jaws, said head having in combination therewith a hollow rotatable spindle, and a reciprocatory rod within said spindle to actuate the parallel threadingaws.

4-.. A rotatable and reciprocatory cutterhead for forming threads on screws provided with parallel threading-jaws pivoted thereto, inclined threading-jaws engaged with said head, means to close the inclined threadingjaws, a jaw-opening device within the head to open the inclined threading-jaws, a hollow spindle engaging said head, means to reciprocate said spindle, a rod reciprocatory within said spindle to actuate the parallel threading-jaws, a feed-screw to actuate said rod, and means to rotate said spindle.

5. A cutter-head for forming threads on screws provided with parallel threading-jaws, means to open and close said jaws, inclined th reading-jaws engaged with said head, means to open and close the inclined threading-jaws, a feed-screw, a sectional feed-nut to engage said screw, and means to open and close said nut upon the feed-screw synchronously with the actuation of said jaws.

6. In combination, a cutter-head provided with parallel threading-jaws and with inclined threading-jaws, a hollow rotatable spindle, a feed-screw, a sectional nut to engage the feed-screw, a feed-screw head engaged upon said spindle,a rod sleeved through screw head engaged with the opposite end of said rod, jaws connected with said sectional nut and with the nut in the feed-screw head to open and close the sectional nut,and means to open and close theinclined threading-jaws in the cutter-head.

7. In combination, a hollow rotatable spindle, a cutter-head carried by said spindle provided with parallel threading-jaws and with inclined threading-jaws, means to actuate the parallel threading-jaws, an opening device, and a sliding collar to actuate the opening device and the inclined threading-jaws, said inclined threading-jaws constructed withangular faces engageable by the sliding collar.

8. In combination, a rotatable hollow spindle, a cutter-head carried thereby, parallel threading-jaws and inclined threading-jaws carried by said head, a rod reciprocatory in said spindle to actuate the parallel threadingjaws,a feed-screw head upon said spindle, a feed-screw,slide-rods carrying the feed-screw, asectional feed-nutengageable with the feedscrew, means connected with the rod in the spindle to actuate the sectional feed-nut,.a sliding collar carried by the slide-rods to actuate the inclined threading-jaws,and means to limit the reciprocation of the cutter-head.

9. In combination, a rotatable hollow spindle, a cutter-head carried thereby, parallel threading-jaws and inclined threading-jaws carried by said head, a rod reciprocatory in said spindle to actuate the parallel threadingjaws, a feed-screw head upon said spindle, a feedscrew,slide-rods carrying the feed-screw, a sectional feed-nut engageable with the feedscrew, means connected with the rod in the spindle to actuate the sectional feed-nut, a sliding collar carried by the slide-rods to actuate the inclined threading-jaws, and means to limit the reciprocation of the cutter-head, said slide-rods moved forward by the feedscrew, and means to restore the slide-rods and cutter-head to normal position without reversing the action of the feed-screw.

10. In combination,-a cntter-head,inclined threading jaws carried thereby, a jaw-opening device within the head to open the said jaws, and a sliding collar to close said jaws. 11. In combination, a cutter-head provided with inclined threading-jaws, a jaw-opening device within the head to open said jaws, slide-rods, a collar engaged upon said head and upon the slide-rods to close said jaws,and means to feed the slide-rods and cutter-head.

In testimony whereof I sign this specification in the presence of two witnesses.

EDWARD PHILLIPS. Witnesses:

N. S. WRIGHT, M. HIcKEY. 

